Improvement in casting type



UNITED STATES PATENT OFFICE..

WILLIAM l?. BARR, OE NEW YORK, N. Y., ASSIGNOR TO GEORGE BRUCE, OF SAME PLAGE.

IMPROVEMENT IN CASTING TYPE.

Specification forming part of Letters Patent No. 9,177, dated August l0, 1852.

To all whom it may concern:

Be it known that I, W'ILLIAM P. BARR, of the city, county, and State of New York, have invented a new and Improved Valve, which I denominate au adjustable type-casting valvef7 and I do hereby declare that the following is a full and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure lis a transverse sectional view of the pot X, showing the relative position of the pump A, pumplehamber K, valve B, vertical valvechannel I, and channel C, leading from pump-chamber K to the spout D. The

` dotted line J J represents the height of metal in the pot. Fig. 2 represents the adjustable screw-p1ug E, with transverse hole G and valve B. Fig. 3 is a plan ot' the pot X, with pump A, adjustable screwplug E, and spout D.

The object of this adjustable valve is to regulate the induction of the precise quantity of melted metal into the chamber of the pump, hence t0 be ejected into the type-mold, and by its adjustable capability to prevent what is technically known as reaction 7 and dragging out7 on the removal of the mold from the spouta very serious obstacle in the working of type casting machines.

The arrangement, construction, and operation of this valve are as follows: The valveseat E is aplug of steel or other suitable metal about half an inch in diameter and three inches in length, whose lower end is cut as a screw about three fourths of an inch up. This screwed end is bored out longitudinally to receive the valve B, whose stem passes up through the plug about threefourths of an inch. The plug E is here inte'rsected by a transverse hole, G, passing through it, which serves as a channel for the passage of the melted metal to the valve B. The valve-V chamber F, as shown in Fig. 1, is bored and threaded correspondingly to receive the plug E with the valve B. The operation of the adjustment is simply by turning with a wrench the plug E, containing the valve B, so as to leave a greater or less space for the valve to play in between its seat in the plug E and the bottom of the chamber F. The bottom of the valve B, Fig. 4, has a transverse groove on its lower surface, to prevent its shutting off all the metal at the raising ot' the pump. It might be stated that the pump in this plan requires no other valve. The effective operation of this arrangement of the valve is this: By raising the pump A the melted metal is dra-wn down through the transverse openings in the plug E, past the valve B, into the chamber F, from which it is ejectedby the descent of the pump and forced into the mold through the channel O and spout D, as indicated by the arrow.

What I claim as my invention, and desire to secure by Letters Patent, is

The employment in type-casting machines of an adjustable valve, substantially in the manner described.

WM. P. BARR. Vtnesses:

D. W. BRUCE, J AMES LINDSAY. 

